$ git clone -n https://src.fedoraproject.org/rpms/crash.git /var/lib/mock/f38-build-side-42-init-devel-1062000-29766/root/chroot_tmpdir/scmroot/crash
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1062000-29766/root/chroot_tmpdir/scmroot/crash'...
$ git fetch origin 22c47c372b0decca7a202a61ae5d681c85edadc5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/crash
 * [new ref]         22c47c372b0decca7a202a61ae5d681c85edadc5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 22c47c3 Update to the latest commit <46344aa2f92b>