$ git clone -n https://src.fedoraproject.org/rpms/R-gitcreds.git /var/lib/mock/f38-build-side-42-init-devel-755394-27676/root/chroot_tmpdir/scmroot/R-gitcreds
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-755394-27676/root/chroot_tmpdir/scmroot/R-gitcreds'...
$ git fetch origin 15f9dc16d344dfe13e1346290628846b72a74246:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-gitcreds
 * [new ref]         15f9dc16d344dfe13e1346290628846b72a74246 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 15f9dc1 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild