$ git clone -n https://src.fedoraproject.org/rpms/git.git /var/lib/mock/f40-build-1924477-25102/root/chroot_tmpdir/scmroot/git
Cloning into '/var/lib/mock/f40-build-1924477-25102/root/chroot_tmpdir/scmroot/git'...
$ git fetch origin ae2c758bf641ec9523c6da5a15cdba814d2a46ea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/git
 * [new ref]         ae2c758bf641ec9523c6da5a15cdba814d2a46ea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ae2c758 update to 2.46.0