$ git clone -n https://src.fedoraproject.org/rpms/iyfct.git /var/lib/mock/f39-build-1768460-41501/root/chroot_tmpdir/scmroot/iyfct
Cloning into '/var/lib/mock/f39-build-1768460-41501/root/chroot_tmpdir/scmroot/iyfct'...
$ git fetch origin b4a40b4908215b5ecbae60474198012a68f2025c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/iyfct
 * [new ref]         b4a40b4908215b5ecbae60474198012a68f2025c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b4a40b4 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild