$ git clone -n https://src.fedoraproject.org/rpms/icecat.git /var/lib/mock/f41-build-847393-163983/root/chroot_tmpdir/scmroot/icecat
Cloning into '/var/lib/mock/f41-build-847393-163983/root/chroot_tmpdir/scmroot/icecat'...
$ git fetch origin a59842c0bf05f4ad952424c363e71ab90c0377d6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/icecat
 * [new ref]         a59842c0bf05f4ad952424c363e71ab90c0377d6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a59842c Release 115.15.0