$ git clone -n https://src.fedoraproject.org/rpms/glycin.git /var/lib/mock/f45-build-43638-804/root/chroot_tmpdir/scmroot/glycin
Cloning into '/var/lib/mock/f45-build-43638-804/root/chroot_tmpdir/scmroot/glycin'...
$ git fetch origin f3250ea4e8f741b72505e4fe68648e62807e0f92:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/glycin
 * [new ref]         f3250ea4e8f741b72505e4fe68648e62807e0f92 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f3250ea Update to version 2.2.2; Fixes RHBZ#2546690