$ git clone -n https://src.fedoraproject.org/rpms/perl-Router-Simple.git /var/lib/mock/f45-build-26051-614/root/chroot_tmpdir/scmroot/perl-Router-Simple
Cloning into '/var/lib/mock/f45-build-26051-614/root/chroot_tmpdir/scmroot/perl-Router-Simple'...
$ git fetch origin e1f5064de7cf354524a289f40f79f359861e6e5f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Router-Simple
 * [new ref]         e1f5064de7cf354524a289f40f79f359861e6e5f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e1f5064 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild