$ git clone -n https://src.fedoraproject.org/rpms/am-utils.git /var/lib/mock/f41-build-1026867-18267/root/chroot_tmpdir/scmroot/am-utils
Cloning into '/var/lib/mock/f41-build-1026867-18267/root/chroot_tmpdir/scmroot/am-utils'...
$ git fetch origin a2a99550179ca2267e1dab02b040e076fe0b0f27:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/am-utils
 * [new ref]         a2a99550179ca2267e1dab02b040e076fe0b0f27 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a2a9955 Eliminate use of obsolete %patchN syntax (#2283636)