$ git clone -n https://src.fedoraproject.org/forks/svashisht/rpms/bash.git /var/lib/mock/f43-build-61063703-6588411/root/chroot_tmpdir/scmroot/bash
Cloning into '/var/lib/mock/f43-build-61063703-6588411/root/chroot_tmpdir/scmroot/bash'...
$ git fetch origin cff7b260e28f054fe18d172beda0d97e9ec55238:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/svashisht/rpms/bash
 * [new ref]         cff7b260e28f054fe18d172beda0d97e9ec55238 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cff7b26 Update to bash-5.3