$ git clone -n https://src.fedoraproject.org/rpms/fop.git /var/lib/mock/f39-build-2334097-59266/root/chroot_tmpdir/scmroot/fop
Cloning into '/var/lib/mock/f39-build-2334097-59266/root/chroot_tmpdir/scmroot/fop'...
$ git fetch origin 752837908ca41a36dcf1eb30df0cbdd2ee227435:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fop
 * [new ref]         752837908ca41a36dcf1eb30df0cbdd2ee227435 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7528379 Fop ver. 2.9