$ git clone -n https://src.fedoraproject.org/rpms/perl-Trace-Mask.git /var/lib/mock/f45-build-27242-622/root/chroot_tmpdir/scmroot/perl-Trace-Mask
Cloning into '/var/lib/mock/f45-build-27242-622/root/chroot_tmpdir/scmroot/perl-Trace-Mask'...
$ git fetch origin 04cb92908c6e8281e6b6540b9b4951247d54b5ba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Trace-Mask
 * [new ref]         04cb92908c6e8281e6b6540b9b4951247d54b5ba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 04cb929 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild