$ git clone -n https://src.fedoraproject.org/rpms/perl-Tree-XPathEngine.git /var/lib/mock/f45-build-27281-622/root/chroot_tmpdir/scmroot/perl-Tree-XPathEngine
Cloning into '/var/lib/mock/f45-build-27281-622/root/chroot_tmpdir/scmroot/perl-Tree-XPathEngine'...
$ git fetch origin 94f2c7e0e83840650e399f81ea0ab22b5346bda2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Tree-XPathEngine
 * [new ref]         94f2c7e0e83840650e399f81ea0ab22b5346bda2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 94f2c7e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild