$ git clone -n https://src.fedoraproject.org/rpms/glycin.git /var/lib/mock/f42-build-side-1-3504324-45983/root/chroot_tmpdir/scmroot/glycin
Cloning into '/var/lib/mock/f42-build-side-1-3504324-45983/root/chroot_tmpdir/scmroot/glycin'...
$ git fetch origin 3bac0e14403e5ee54855ce41cb5dc452a1403cdc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/glycin
 * [new ref]         3bac0e14403e5ee54855ce41cb5dc452a1403cdc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3bac0e1 Update to version 1.2.0; Fixes RHBZ#2352544