$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-hap.git /var/lib/mock/f40-build-2523973-61809/root/chroot_tmpdir/scmroot/gap-pkg-hap
Cloning into '/var/lib/mock/f40-build-2523973-61809/root/chroot_tmpdir/scmroot/gap-pkg-hap'...
$ git fetch origin 0f1d631b10dc79ad032f2c5d46cea098aa941a37:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-hap
 * [new ref]         0f1d631b10dc79ad032f2c5d46cea098aa941a37 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0f1d631 Version 1.62