$ git clone -n https://src.fedoraproject.org/rpms/glycin.git /var/lib/mock/f42-build-side-1-3588961-46952/root/chroot_tmpdir/scmroot/glycin
Cloning into '/var/lib/mock/f42-build-side-1-3588961-46952/root/chroot_tmpdir/scmroot/glycin'...
$ git fetch origin e12fd11e6268e3670333d56e4cad662f3c7f8536:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/glycin
 * [new ref]         e12fd11e6268e3670333d56e4cad662f3c7f8536 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e12fd11 Update to version 1.2.2; Fixes RHBZ#2375215