$ git clone -n https://src.fedoraproject.org/rpms/ck.git /var/lib/mock/f39-build-1545025-36675/root/chroot_tmpdir/scmroot/ck
Cloning into '/var/lib/mock/f39-build-1545025-36675/root/chroot_tmpdir/scmroot/ck'...
$ git fetch origin ce7a25878a1ffeaabd3beebbfcc5613e236450f3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ck
 * [new ref]         ce7a25878a1ffeaabd3beebbfcc5613e236450f3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ce7a258 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild