$ git clone -n https://src.fedoraproject.org/rpms/libloader.git /var/lib/mock/f41-build-1266672-23069/root/chroot_tmpdir/scmroot/libloader
Cloning into '/var/lib/mock/f41-build-1266672-23069/root/chroot_tmpdir/scmroot/libloader'...
$ git fetch origin 611e1e5eda6202574350de5db3d61ca7955740a0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libloader
 * [new ref]         611e1e5eda6202574350de5db3d61ca7955740a0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 611e1e5 Eliminate use of obsolete %patchN syntax (#2283636)