$ git clone -n https://src.fedoraproject.org/rpms/rust-glycin-core.git /var/lib/mock/f45-build-42052-788/root/chroot_tmpdir/scmroot/rust-glycin-core
Cloning into '/var/lib/mock/f45-build-42052-788/root/chroot_tmpdir/scmroot/rust-glycin-core'...
$ git fetch origin 300294936a26b789bb53914c6296b430b6e0ac2d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-glycin-core
 * [new ref]         300294936a26b789bb53914c6296b430b6e0ac2d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3002949 Update to version 4.0.0; Fixes RHBZ#2530774