$ git clone -n https://src.fedoraproject.org/rpms/perl-Time-timegm.git /var/lib/mock/f40-build-732635-104925/root/chroot_tmpdir/scmroot/perl-Time-timegm
Cloning into '/var/lib/mock/f40-build-732635-104925/root/chroot_tmpdir/scmroot/perl-Time-timegm'...
$ git fetch origin 4084994122afc39d41707f4c9f47783b00f15a07:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Time-timegm
 * [new ref]         4084994122afc39d41707f4c9f47783b00f15a07 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4084994 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild