$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-HexString.git /var/lib/mock/f40-build-2021360-46711/root/chroot_tmpdir/scmroot/perl-Test-HexString
Cloning into '/var/lib/mock/f40-build-2021360-46711/root/chroot_tmpdir/scmroot/perl-Test-HexString'...
$ git fetch origin 7da817f44400fcbb32c5ab87c7d0941dd376fe84:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-HexString
 * [new ref]         7da817f44400fcbb32c5ab87c7d0941dd376fe84 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7da817f Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild