$ git clone -n https://src.fedoraproject.org/rpms/testcloud.git /var/lib/mock/f39-build-2013265-45864/root/chroot_tmpdir/scmroot/testcloud
Cloning into '/var/lib/mock/f39-build-2013265-45864/root/chroot_tmpdir/scmroot/testcloud'...
$ git fetch origin 8c53fdd82ab48016818abd2d937356893310c753:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/testcloud
 * [new ref]         8c53fdd82ab48016818abd2d937356893310c753 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c53fdd Bump release