$ git clone -n https://src.fedoraproject.org/rpms/librsync.git /var/lib/mock/f45-build-16893-493/root/chroot_tmpdir/scmroot/librsync
Cloning into '/var/lib/mock/f45-build-16893-493/root/chroot_tmpdir/scmroot/librsync'...
$ git fetch origin 311b224cde2beeaa07eee1d8da8b234540489b01:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/librsync
 * [new ref]         311b224cde2beeaa07eee1d8da8b234540489b01 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 311b224 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild