$ git clone -n https://src.fedoraproject.org/rpms/rust-glib0.17.git /var/lib/mock/f39-build-1569920-37740/root/chroot_tmpdir/scmroot/rust-glib0.17
Cloning into '/var/lib/mock/f39-build-1569920-37740/root/chroot_tmpdir/scmroot/rust-glib0.17'...
$ git fetch origin 53bf2198505076bf754d95caf138aa314399b368:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-glib0.17
 * [new ref]         53bf2198505076bf754d95caf138aa314399b368 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 53bf219 Initial import (glib 0.17 compat package)