$ git clone -n https://src.fedoraproject.org/rpms/libecpg.git /var/lib/mock/f41-build-847426-163983/root/chroot_tmpdir/scmroot/libecpg
Cloning into '/var/lib/mock/f41-build-847426-163983/root/chroot_tmpdir/scmroot/libecpg'...
$ git fetch origin 2f6e14c44c364eaa27f5eadb7974402095fac9f4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libecpg
 * [new ref]         2f6e14c44c364eaa27f5eadb7974402095fac9f4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f6e14c Update to 16.4