$ git clone -n https://src.fedoraproject.org/rpms/bash.git /var/lib/mock/f42-build-3291982-41426/root/chroot_tmpdir/scmroot/bash
Cloning into '/var/lib/mock/f42-build-3291982-41426/root/chroot_tmpdir/scmroot/bash'...
$ git fetch origin ddaa95fbdb870de2edb7db174b54462b7adddc11:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bash
 * [new ref]         ddaa95fbdb870de2edb7db174b54462b7adddc11 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ddaa95f Fix FTBFS in Fedora rawhide/f42