$ git clone -n https://src.fedoraproject.org/rpms/perl-Hash-Merge.git /var/lib/mock/f40-build-2304757-57042/root/chroot_tmpdir/scmroot/perl-Hash-Merge
Cloning into '/var/lib/mock/f40-build-2304757-57042/root/chroot_tmpdir/scmroot/perl-Hash-Merge'...
$ git fetch origin 372ccb4e713b77943995e355edb5358d01b08aa2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Hash-Merge
 * [new ref]         372ccb4e713b77943995e355edb5358d01b08aa2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 372ccb4 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild