$ git clone -n https://src.fedoraproject.org/rpms/fakeroot.git /var/lib/mock/f45-build-8636-393/root/chroot_tmpdir/scmroot/fakeroot
Cloning into '/var/lib/mock/f45-build-8636-393/root/chroot_tmpdir/scmroot/fakeroot'...
$ git fetch origin 80136a78180e6054c391f6a44458a3f5b32d4410:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fakeroot
 * [new ref]         80136a78180e6054c391f6a44458a3f5b32d4410 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 80136a7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild