$ git clone -n https://src.fedoraproject.org/rpms/libgexiv2.git /var/lib/mock/f39-build-1557907-37302/root/chroot_tmpdir/scmroot/libgexiv2
Cloning into '/var/lib/mock/f39-build-1557907-37302/root/chroot_tmpdir/scmroot/libgexiv2'...
$ git fetch origin 131487931db6cde1609071e501453c7af1106737:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libgexiv2
 * [new ref]         131487931db6cde1609071e501453c7af1106737 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1314879 Update to 0.14.2