$ git clone -n https://src.fedoraproject.org/rpms/gnutls.git /var/lib/mock/f41-build-820127-152085/root/chroot_tmpdir/scmroot/gnutls
Cloning into '/var/lib/mock/f41-build-820127-152085/root/chroot_tmpdir/scmroot/gnutls'...
$ git fetch origin 7e61bcbcbdbec6ec9b4517238d471df429a47403:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnutls
 * [new ref]         7e61bcbcbdbec6ec9b4517238d471df429a47403 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7e61bcb Fix FIPS build with RPM 4.20