$ git clone -n https://src.fedoraproject.org/rpms/perl-File-Remove.git /var/lib/mock/f45-build-23593-598/root/chroot_tmpdir/scmroot/perl-File-Remove
Cloning into '/var/lib/mock/f45-build-23593-598/root/chroot_tmpdir/scmroot/perl-File-Remove'...
$ git fetch origin 81c7aa4a5a38ee8dba9969b317c43d5b2374479f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-File-Remove
 * [new ref]         81c7aa4a5a38ee8dba9969b317c43d5b2374479f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 81c7aa4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild