$ git clone -n https://src.fedoraproject.org/rpms/glow.git /var/lib/mock/f42-build-side-1-3504313-45983/root/chroot_tmpdir/scmroot/glow
Cloning into '/var/lib/mock/f42-build-side-1-3504313-45983/root/chroot_tmpdir/scmroot/glow'...
$ git fetch origin 5d638c23393dbde3e1eafcd08be672bee2986e06:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/glow
 * [new ref]         5d638c23393dbde3e1eafcd08be672bee2986e06 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5d638c2 Update to version 2.1.0 rhbz#2348672