$ git clone -n https://src.fedoraproject.org/rpms/perl-Time-Piece-MySQL.git /var/lib/mock/f45-build-27161-621/root/chroot_tmpdir/scmroot/perl-Time-Piece-MySQL
Cloning into '/var/lib/mock/f45-build-27161-621/root/chroot_tmpdir/scmroot/perl-Time-Piece-MySQL'...
$ git fetch origin 4090687e9ec5a703927ee25c8bbc233f2b74dc80:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Time-Piece-MySQL
 * [new ref]         4090687e9ec5a703927ee25c8bbc233f2b74dc80 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4090687 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild