$ git clone -n https://src.fedoraproject.org/rpms/perl-Date-Leapyear.git /var/lib/mock/f45-build-22947-595/root/chroot_tmpdir/scmroot/perl-Date-Leapyear
Cloning into '/var/lib/mock/f45-build-22947-595/root/chroot_tmpdir/scmroot/perl-Date-Leapyear'...
$ git fetch origin a88848b14ecf47c4f20f1b13ad0c42268830a6cf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Date-Leapyear
 * [new ref]         a88848b14ecf47c4f20f1b13ad0c42268830a6cf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a88848b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild