$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Simple.git /var/lib/mock/f39-build-1435170-31974/root/chroot_tmpdir/scmroot/perl-Test-Simple
Cloning into '/var/lib/mock/f39-build-1435170-31974/root/chroot_tmpdir/scmroot/perl-Test-Simple'...
$ git fetch origin 28a889b472ac0a0e5d72199f4e3911dbf8260071:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Simple
 * [new ref]         28a889b472ac0a0e5d72199f4e3911dbf8260071 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 28a889b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild