$ git clone -n https://src.fedoraproject.org/rpms/libcap.git /var/lib/mock/f42-build-867454-175505/root/chroot_tmpdir/scmroot/libcap
Cloning into '/var/lib/mock/f42-build-867454-175505/root/chroot_tmpdir/scmroot/libcap'...
$ git fetch origin 4126e7676b42090f0e9263b38fa176641dde6b39:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libcap
 * [new ref]         4126e7676b42090f0e9263b38fa176641dde6b39 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4126e76 Rebuilt for the bin-sbin merge (2nd attempt)