$ git clone -n https://src.fedoraproject.org/rpms/rust-glycin.git /var/lib/mock/f40-build-2718239-72893/root/chroot_tmpdir/scmroot/rust-glycin
Cloning into '/var/lib/mock/f40-build-2718239-72893/root/chroot_tmpdir/scmroot/rust-glycin'...
$ git fetch origin 609732304377a239543ba4a11862f7c13eee24e8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-glycin
 * [new ref]         609732304377a239543ba4a11862f7c13eee24e8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6097323 Update to version 1.0.1; Fixes RHBZ#2269622